Car air-brake release



June 18, 1929. Q L, MEADOWS 1.718.168

' '1 01m AIR BRAKE RELEASE Filed Jan. 18, 1928 2 Sheets-Sheet 1 d. Z..Meadow9 INVENTOR ATTO R N EY June 18, 1929. C MEADOWS CAR AIR BRAKE RELEASE Filed Jan 18, 1928 2 sh ets-sheet (5.17. flaadours ATTORNEY Patented June 18, 1929.

I pressure in the same for opening UNITED STATES can AIR-BRAKE RELEASE.

Application filed January 18, 1828. Serial No. 247,660.

This invention relates to means for releasing the brakes of those cars in a tra n which fail to release when the air pressure in the main brake air line is charged or rechargcd to a predetermined pressure and brakes fail to release. The general ob eet of the invention is to provide an auxiliary air line, with means operated by the air theblccd cocks of the auxiliary reservoirs to those cars whose brakes fail to release, said auxiliary line being provided with a controlling valve in the cab of the locomotive.

Another object of the invention is to provide a valved connection between each sec tion of the main brake line and each section of the auxiliary line so that by opening the vali'e'in said connection, the air in the main line can be used for opening the bleed cock to-relcase thebrakes of a car. or several cars on a siding, for instance.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described il-' lustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to-the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a diagrammatic view showing the invention applied to the brake means of a car.

Figure 2 is a section on line 2-2 of Figure-l, showing the valve in one position.

Figure 3 is a similar view showing the valve in another position.

Figure 4 is a section on line 44 of Fig ure 1.

Fi re 5 is an enlarged plan view showing t e connection between the two air lines.-

In these drawings, A indicates the mainbrake line, B the auxiliary reservoir, C the brake cylinder, D the triple valve and E the bleedcock for the auxiliary reservoir,

these parts being of the ordinary construction.

In carrying out my invention, I provide an auxiliary air line 1 which is made similar to the line A and is connected with the air compressor, or an auxiliary compressorm the locomotlveand the passage of air there- .through is controlled by an engineersvalve.

A cylinder 2 is supported adjacent the auxiliary reservoir and the piston 3 therein has its red 5 connected with an arm 6- of the bleed cock E. Abranch pipe 7 con- PATENT OFFICE;

nects one end ofthis cylinder with the line. 1, a valve casing 8 being placed in the branch with the stem of the. valve 9 therein connected to an arm 10 whielrhas its outer end slotted to receive a pin 11 carried by the piston rod 12 of the piston in the brake cylinder, said rod 12 being connected with the brake lever 13, as usual. The valve 9 is formed with a port .14 and with a bleed port 15.

. .,,70"' When the brakes are applied, the lm'ove 2 'i ment of the piston rod 12 will move} the' arm' 10 to a position where the port '14 will open the branch line 7 to then-line .1;.-

so that, air from said line 1 will'pass through the branch line into the cylinder 2and push the piston 3 forwardly againstthe action of its spring 16 and thus open the bleed cockrv I E so as to drain the auxiliary reservoir. Bf;

Thus if thebrakes of one or moreicarsof a train should remain applied after-the brake line pressure has been'reduced to cause the triple valve ordinarily to act to place the brake cylinder in communication withithe atmosphere the engineer would openithe valve in the auxiliary line 1, .so that-pair would pass through the line' land through a the valves 8 of those cars, vthe brakes "of which have failed to release and through the branch lines 7 into the cylinders 2 so as to cause the pistons in said cylinders 2 to open the cocks E and thus drain-the. aux

iliary reservoirs so that air remaining, in the brake cylinders 3 will escape andthus cause the brakesof these cars to be released.

It will be seen that the air from line 1 cannot pass through the branches 7 of'the cars,"

the. brakes of which have been released, as

the valves -8 of such cars have been moved- .to closed 'osition by the retraction of the piston re s 12. As soon as each valve 8 closes. the bleed port 15 will bleed the branch 7 and the cylinder 2' so thatthe spring 16 will move the piston 3 backto its original position, thus closing the bleedv .cock E.

Each sectionof the main line A is connected to' each section of the auxiliary line 1 by a pipe 17 which contains a hand oper-v ated valve 18. Thus when it is desired to no} 2 f i it Y 1,718,168

' removethe brakes got. a car on'-a.sidi ng," for nstance, 1t1s':s1mp1y necessary to open the valve 18 to perm1t the air 1n the main line A-to ipasstlnough thepipe 17 into'thc pipe branch, it being understood that the valve 8 is open to the cylinder 2 to causethe piston thereof to leave the auxiliary reservoir and thus the brakes of said car will be re- 1 when a cook 21 in the-main linejis closed.

From the foregoingit will -be seen thatthe engineer can relea'se'the brakes of those cars,

changes in the construction aml in'the com associated with tl(ll':ltlXIlI21l' Y reservoir. :1

the brakesotwhich fail to rcleasewhen the air pressure in the main brake line is charged or recharged to a predetermined 1f ressurc,'"so. that it is not neceswa'y to operate the bleed cocks by hand.

It'is thought from the foregoing dcscrip tron. that th'e-advantages'and novel features of my invention will be'readilyapparent 1 1 It is to be understood that I may, make bination and arrangement of the 'several parts,"pi'o\-'ided that such changes fall witliin a the scope of the appended claims.

IWhat I claim is 1. In combination with a b 'akesystem of v a train, means operated from the-cab of the locomotive for opening the bleed cocks of the auxiliary reservolrs of those carswhose brakes fail to release when the brakeline pressure is charged, or recharged to a-predetermined pressur such means comprising.

an auxiliary air line, a cylinder associated with each auxiliary reservoir, :1 brznlchline illllfi a hand operated valve in each pipe and connecting 'each cylinder with the auxiliary ilia'ry reservoir to open said cock when the piston is moved forwardlyby'the-air pres sure inthe branch line, a. valvcin' said'bran'ch.

line, means for-opening the valve when the plston of the brakecylmder 1s )ro ected.

a train, means operated-from the cab of the .locomotive 'for'opening the bleed cocks of I the auxiliary reservoirs of those cars whose brakes fail to release when the brake line pressure -ischarged or recharged to a' pre- "determined pressure, such means comprising an auxiliary air line, a cylinder associated with each auxlliary reservoir, a branch line connecting each cylinder with the auxiliary line, a piston. in each cylinder, a rod connected witlrthe said piston and also connected with an arm of the.bleed cock of the auxiliary reservoir to open said cock when the piston is moved forwardly by the air pres sure in the branch line, a valve in said branch line, means for opening the valve whcn the piston of the brake cylinder is projected, said means COnlpllSlIlg' an arm on the valve hav-- -2. In combination with a bra e system of ing. the branch pipe and its cylinder when the-valve is in closed position. I

3.-Incombination wit-h the brake'systeni of a traln. an auxiliary air hne. a \'lllltl0l branch line connecting each-cyliluler with the auxiliary line,'apistonin each cylinder. a piston rod connectingeach. piston with an arm of the bleed cock of each auxiliary reservoir, a spring'for normally holding the'pi'ston rctractet'l withthe bleed cock ('lostwl. a. valve in each branch line. means for holding the valve open when the brakes are applied, a bleed cock in each valve for draining the branch line and cylinder when the valve is closed. a pipe connecting each section of the inain line with eachsection of the auxiliarv alink torconnectin; each cock in the main line to the companion cock of the auxiliary linc."'- a j a I r In testimony whereof I atlix my signature.

7 CLYDE MEADOWS. 

